Cal. Civ. Code § 1788.21

(a) In connection with any covered credit existing or requested to be extended to a person, that person shall within a reasonable time notify the creditor or prospective creditor of any change in that person’s name, address, or employment.
(b) Each responsibility set forth in subdivision (a) shall apply only if and after the creditor clearly and conspicuously in writing discloses that responsibility to that person.